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KR20110024372A - Belt tension automatic adjusted type rack assist motor driven power steering - Google Patents

Belt tension automatic adjusted type rack assist motor driven power steering Download PDF

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Publication number
KR20110024372A
KR20110024372A KR1020090082350A KR20090082350A KR20110024372A KR 20110024372 A KR20110024372 A KR 20110024372A KR 1020090082350 A KR1020090082350 A KR 1020090082350A KR 20090082350 A KR20090082350 A KR 20090082350A KR 20110024372 A KR20110024372 A KR 20110024372A
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KR
South Korea
Prior art keywords
rack
driven pulley
diameter
ball nut
motor
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KR1020090082350A
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Korean (ko)
Inventor
김한준
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현대모비스 주식회사
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Priority to KR1020090082350A priority Critical patent/KR20110024372A/en
Publication of KR20110024372A publication Critical patent/KR20110024372A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0421—Electric motor acting on or near steering gear
    • B62D5/0424—Electric motor acting on or near steering gear the axes of motor and final driven element of steering gear, e.g. rack, being parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: A rack assist type electric power steering apparatus for automatically controlling the tension of a belt is provided to improve the convenience of operational processes by changing an axial distance between a motor side pulley and a rack-bar side pulley which are connected using the belt. CONSTITUTION: A rack assist type electric power steering apparatus includes a driven pulley(7), a ball nut(9), and a rack-bar. The drive pulley transmits torque to the ball nut. The ball nut is combined with the rack-bar. The driven pulley includes a clearance and is capable of vertically moving with based on the axial center of the rack-bar. The driven pulley is matched to the axial center of the rack-bar after the ball nut is combined with the rack-bar.

Description

자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치{Belt tension automatic adjusted type Rack assist Motor Driven Power Steering} Belt tension automatic adjusted type Rack assist Motor Driven Power Steering

본 발명은 랙 어시스트식 전동 조향장치에 관한 것으로, 특히 조립이 이루어지면서 자동으로 벨트 장력을 갖도록 하는 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rack assist type electric steering apparatus, and more particularly, to an automatic belt tension adjusting type rack assist type electric steering apparatus which automatically has a belt tension while being assembled.

일반적으로 전동 조향장치는 차속과 조향 토크센서 측정값으로 전동모터를 제어하여, 운전자에게 최적의 조향 조작성을 제공하는 편리함을 갖는다.In general, the electric steering apparatus has the convenience of controlling the electric motor by the vehicle speed and the steering torque sensor measured value, thereby providing the driver with optimum steering operability.

상기와 같은 전동 조향장치로는 EHPS(Electro-hydraulic Power Steering)이나 또는 MDPS(Motor Driven Power Steering)가 있으며, 이중 MDPS는 동력을 발생하는 모터와 연결된 웜축(Worm-Shaft)이 조향축(Steering-Shaft)과 연결된 웜휠(Worm Wheel)을 회전시킴으로써, 운전자의 조향력을 어시스트(assist)한다. Such an electric steering apparatus includes EHPS (Electro-hydraulic Power Steering) or MDPS (Motor Driven Power Steering). Among the MDPS, a steering shaft (Worm-Shaft) connected to a power generating motor is steered. By rotating the worm wheel connected to the shaft, the driver's steering force is assisted.

또한, 랙 어시스트식 전동 조향장치인 R-MDPS(Rack assist Motor Driven Power Steering)는 모터에 의한 구동 토크(Torque)를 받아 랙바(Rack Bar)의 축 이동을 구현하는 방식이다. In addition, rack assist motor driven power steering (R-MDPS), which is a rack assist type electric steering device, is a method of implementing shaft movement of a rack bar by receiving a torque from a motor.

상기와 같은 R-MDPS는 모터 회전력을 랙바의 축방향 이동으로 전환하기 위한 수단이 요구되고, 이를 위해 벨트와 풀리 및 볼너트를 이용한다.The R-MDPS as described above requires a means for converting the motor rotational force to the axial movement of the rack bar, and uses a belt, a pulley and a ball nut for this purpose.

상기 볼너트는 랙바에 결합되고, 상기 풀리는 볼너트를 회전시키도록 고정되며, 상기 벨트는 모터쪽과 풀리간을 연결해 모터 동력을 전달한다.The ball nut is coupled to the rack bar, the pulley is fixed to rotate the ball nut, the belt is connected between the motor side and the pulley to transfer the motor power.

상기 벨트는 모터쪽과 풀리사이에서 적절한 장력을 유지해야 하므로 조립시 모터의 장착 위치를 적절히 조절하는 작업 공정을 수행하며, 이러한 작업은 모터가 결합된 하우징간 조립 위치를 조절해 구현된다. Since the belt has to maintain an appropriate tension between the motor side and the pulley, the belt performs an operation process of properly adjusting the mounting position of the motor during assembly, and this operation is implemented by adjusting the assembly position between the housings to which the motor is coupled.

일례로, 모터쪽 하우징과 풀리쪽 하우징에 한쌍의 힌지볼트(A,B)를 체결한 후, 한쪽 힌지볼트(A)를 중심으로 모터를 회전시켜 모터 장착 위치를 잡으면서 벨트 장력을 확보한 다음, 다시 모터를 윈위치시켜 힌지볼트(B)를 체결하는 방식을 적용한다.For example, after fastening a pair of hinge bolts (A, B) between the motor housing and the pulley housing, and rotating the motor around one of the hinge bolts (A) to secure the belt tension while positioning the motor Apply the method of tightening the hinge bolt (B) by winching the motor again.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 벨트로 연결된 모터쪽과 랙바쪽 풀리간 축간거리를 조립과정에서 변화시켜 벨트 장력을 자동으로 형성시킴으로써, 벨트의 조립과 장력조절을 위한 공정상 번거러움을 해소하면서도 벨트 부여 장력 품질을 일정하게 유지할 수 있는 R-MDPS(Rack assist Motor Driven Power Steering)를 제공함에 목적이 있다.Accordingly, the present invention has been made in view of the above, by changing the interaxial distance between the motor side connected to the belt and the rack bar pulley in the assembly process to automatically form the belt tension, the process for assembly and tension adjustment of the belt It is an object of the present invention to provide R-MDPS (Rack assist Motor Driven Power Steering), which can alleviate phase hassles and maintain a constant belt imparting tension quality.

또한, 본 발명은 벨트에 부여되는 최적 장력을 풀리 조립시 자동적으로 구현됨으로써, 조립시간을 단축하면서 조립공정을 용이하게 자동화 할 수 있는 R- MDPS(Rack assist Motor Driven Power Steering)를 제공함에 목적이 있다. In addition, an object of the present invention is to provide an R-MDPS (Rack assist Motor Driven Power Steering) capable of easily automating the assembly process while reducing the assembly time by automatically implementing the optimum tension applied to the belt pulley assembly. have.

상기와 같은 목적을 달성하기 위한 본 발명은, 조향기어(1)를 장착한 랙하우징(2)의 랙바(2a)의 축방향 이동을 위한 동력을 모터(4)로 제공하는 랙 어시스트식 전동 조향장치에 있어서, The present invention for achieving the above object, the rack assist type electric steering for providing power to the motor (4) for the axial movement of the rack bar (2a) of the rack housing (2) equipped with a steering gear (1). In the device,

상기 모터(4)에 고정된 구동풀리(6)와 벨트(8)로 연결되어, 상기 랙바(2a)에 결합된 볼너트(9)로 회전력을 전달하는 종동풀리(7)를 갖추되, 상기 랙바(2a)의 축중심에 대해 상하로 움직이는 여유간격을 갖고, 상기 볼너트(9)와 조립완료상태에서 상기 랙바(2a)의 축중심에 일치되는 상기 종동풀리(7)를 포함한 것을 특징으로 한다.The driven pulley 6 fixed to the motor 4 and the belt 8 are connected to each other, and are provided with a driven pulley 7 for transmitting rotational force to the ball nut 9 coupled to the rack bar 2a. It characterized in that it comprises a driven pulley (7) having a clearance gap moving up and down with respect to the axis center of the rack bar (2a), and coincides with the axis of the rack bar (2a) in the assembled state with the ball nut (9) do.

상기 종동풀리(7)는 안쪽 공간으로 외측내경단(7a)에 이어진 내측내경단(7b)의 직경을 줄여 2단 직경으로 단차시키며, 상기 내측내경단(7b)은 상기 볼너트(9)의 최대 직경인 위치플랜지(9a)가 삽입될 수 있는 직경을 갖는다. The driven pulley (7) reduces the diameter of the inner inner diameter end (7b) connected to the outer inner end (7a) to the inner space and stepped to a two-stage diameter, the inner inner end (7b) of the ball nut (9) The maximum diameter of the position flange 9a has a diameter into which it can be inserted.

상기 종동풀리(7)에는 상기 랙바(2a)의 직경보다 큰직경으로 축중심에 축홀(7c)을 뚫고, 상기 축홀(7c)의 주위로 다수의 볼트홀(7d)을 뚫어준다.The driven pulley 7 drills the shaft hole 7c at the shaft center with a diameter larger than the diameter of the rack bar 2a, and drills a plurality of bolt holes 7d around the shaft hole 7c.

이러한 본 발명에 의하면, 모터쪽과 랙바쪽 풀리 조립시 변화되는 축간거리를 이용해 벨트장력을 자동으로 일정하게 유지할 수 있어, 벨트장력 조절을 위한 공정상 번거러움 제거로 조립시간 단축은 물론, 조립공정 자동화적용도 용이하게 구현되는 효과를 갖는다.According to the present invention, it is possible to automatically maintain a constant belt tension by changing the shaft distance when the motor and rack bar pulley assembly, the assembly time is reduced, as well as the assembly process automation by eliminating the process hassle for adjusting the belt tension The application also has the effect of being easily implemented.

또한, 본 발명은 벨트장력 형성이 모터쪽과 랙바쪽 풀리의 축간거리 변화로 이루어지므로, 벨트장력 조정시 모터쪽 추가적인 작업이나 조립 구조등을 필요로하는 힌지볼트 적용에 따른 제반 문제를 모두 해소함은 물론, 구조 단순화에 따른 원가 절감 효과를 갖는다.In addition, the present invention is because the belt tension is formed by the change of the shaft distance between the motor side and the rack bar pulley, all the problems associated with the application of the hinge bolt that requires additional work or assembly structure on the motor side when adjusting the belt tension is solved Of course, there is a cost reduction effect due to the simplified structure.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명하며, 이러한 실시예는 일례로서 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 여러 가지 상이한 형태로 구현될 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않는다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

도 1은 본 발명에 따른 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치의 구성도를 도시한 것인바, 본 발명의 랙 어시스트식 전동 조향장치인 R-MDPS(Rack assist Motor Driven Power Steering)는 조향휠의 조작에 따라 조향을 구현하는 조향기어(1)와, 직선이동으로 차륜을 조타하는 랙바(2a)를 갖춘 랙하우징(2)과, 상기 조향기어(1)의 작동에 따른 조타력을 모터(4)의 동력으로 발생시키는 조타력부여기(3)를 갖춘다.1 is a block diagram of an automatic belt tension control type rack assist type electric steering apparatus according to the present invention, which is a rack assist motor driven power steering (R-MDPS) of the present invention. The steering gear 1 which implements steering according to the operation of the wheel, the rack housing 2 which has a rack bar 2a for steering the wheel by linear movement, and the steering force according to the operation of the steering gear 1 It is equipped with a steering force giver (3) generated by the power of (4).

본 실시예에 따른 상기 조타력부여기(3)는 모터(4)를 이용해 회전동력을 발생시키고, 상기 모터(4)의 회전력을 랙바(2a)쪽으로 전달하면서 동시에 랙바(2a)를 축방향으로 이동시키는 동력전환수단으로 구성한다.The steering force applying machine 3 according to the present embodiment generates the rotational power by using the motor 4, and transmits the rotational force of the motor 4 to the rack bar 2a, while simultaneously moving the rack bar 2a in the axial direction. It consists of a power switching means for moving.

상기 모터(4)는 DC 모터를 적용한다.The motor 4 applies a DC motor.

상기 동력전환수단은 풀리하우징(5)과, 모터(4)의 모터축(4a)에 결합된 구동풀리(6)와, 랙바(2a)를 축방향으로 이동시키는 회전력을 발생하는 볼너트(9)와, 상기 볼너트(9)에 고정되어 볼너트(9)를 회전시키는 종동풀리(7)와, 상기 구동풀리(6)의 회전력을 상기 종동풀리(7)로 전달하도록 연결된 벨트(8)로 구성한다.The power switching means includes a pulley housing 5, a drive pulley 6 coupled to the motor shaft 4a of the motor 4, and a ball nut 9 for generating a rotational force for moving the rack bar 2a in the axial direction. ), A driven pulley (7) fixed to the ball nut (9) to rotate the ball nut (9), and a belt (8) connected to transfer the rotational force of the drive pulley (6) to the driven pulley (7). It consists of.

상기와 같은 동력전환수단을 구성하는 회전부 일례로, 상기 종동풀리(7)와 볼너트(9)등에는 풀리하우징(5)을 이용해 설치된 다수 베어링으로 지지되며, 이는 일반적인 구성요소이다.In one example of the rotating unit constituting the power conversion means as described above, the driven pulley (7) and the ball nut (9) is supported by a plurality of bearings installed using the pulley housing (5), which is a general component.

본 실시예에서는 상기 구동풀리(6)와 종동풀리(7)의 축간거리를 조립과정에서 변화시켜줌으로써, 상기 구동풀리(6)와 종동풀리(7)를 감싸 연결한 벨트(8)에 부여되는 장력을 자동으로 형성하는 방식을 적용한다.In this embodiment, by varying the axial distance between the drive pulley 6 and the driven pulley 7 in the assembling process, it is given to the belt 8 wrapped around the drive pulley 6 and driven pulley 7 Apply the method of automatically forming tension.

이를 위해 상기 종동풀리(7)는 개방된 반대쪽의 막혀진 부위로 축중심에 뚫린 축홀(7c)의 주위로 다수의 볼트홀(7d)을 뚫어 고정구조를 갖추며, 안쪽 공간으로 외측내경단(7a)에 이어진 내측내경단(7b)을 단차진 직경으로 가공한 구조를 갖는다.To this end, the driven pulley (7) has a fixed structure by drilling a plurality of bolt holes (7d) around the shaft hole (7c) in the center of the shaft to the blocked portion of the open opposite side, and the outer inner diameter (7a) to the inner space ) Has a structure in which the inner inner diameter end 7b that is connected to the inner circumferential end 7b is processed into a stepped diameter.

상기 외측내경단(7a)은 볼너트(9)의 최대 직경인 위치플랜지(9a)에 비해 큰 직경이며, 상기 내측내경단(7b)은 상기 위치플랜지(9a)와 거의 동일한 직경을 가지 며, 상기 축홀(7c)은 랙바(2a)의 직경보다 큰 직경을 갖는다.The outer inner diameter end 7a is larger in diameter than the position flange 9a which is the maximum diameter of the ball nut 9, and the inner inner end 7b has a diameter substantially the same as that of the position flange 9a. The shaft hole 7c has a diameter larger than the diameter of the rack bar 2a.

이와 같이 본 실시예에 따른 R-MDPS(Rack assist Motor Driven Power Steering)는 모터(4)의 회전력을 전달하는 종동풀리(7)가 모터(4)와 랙바(2a)의 축간거리를 조립전후로 변화시킴으로써, 벨트(8)의 장력 확보를 자동으로 구현한다.As described above, in the rack assist motor driven power steering (R-MDPS) according to the present embodiment, the driven pulley 7 transmitting the rotational force of the motor 4 changes the distance between the shafts of the motor 4 and the rack bar 2a before and after assembly. In this way, the tension of the belt 8 can be secured automatically.

도 2(가),(나)는 본 실시예에 따라 벨트(8)의 장력 확보가 조립시 구현됨을 나타낸다.2 (a) and (b) show that the securing of the tension of the belt 8 is implemented upon assembly according to this embodiment.

도 2(가)에 도시된 바와 같이 모터(4)가 랙바(2a)에 대해 위치를 잡으면, 모터(4)의 모터축(4a)에 고정된 구동풀리(6)와 랙바(2a)사이는 축간거리B를 형성한다.As shown in FIG. 2A, when the motor 4 is positioned with respect to the rack bar 2a, between the drive pulley 6 fixed to the motor shaft 4a of the motor 4 and the rack bar 2a. Axle distance B is formed.

상기와 같은 축간거리B는 변화될 수 없는 고정간격이다.The axis distance B as described above is a fixed interval that cannot be changed.

이러한 상태에서 상기 랙바(2a)에 종동풀리(7)를 끼운 후, 상기 종동풀리(7)를 위쪽으로 올려 랙바(2a)에 결합된 볼너트(9)쪽으로 밀착된 가조립 상태로 만들어 준다.After inserting the driven pulley (7) in the rack bar (2a) in this state, the driven pulley (7) is raised to make the assembled state in close contact with the ball nut (9) coupled to the rack bar (2a).

상기와 같이 종동풀리(7)를 위쪽으로 올리면, 상기 종동풀리(7)는 외측내경단(7a)의 아래쪽이 볼너트(9)의 최대 직경인 위치플랜지(9a)에 밀착되지만, 그 위쪽은 상기 위치플랜지(9a)에서 떨어진 간격C을 형성한다.When the driven pulley 7 is raised upward as described above, the driven pulley 7 is in close contact with the position flange 9a of which the lower end of the outer inner diameter end 7a is the maximum diameter of the ball nut 9, but the upper side thereof is A gap C spaced apart from the position flange 9a is formed.

상기 종동풀리(7)와 볼너트(9)사이에 형성된 간격C로 인해 구동풀리(6)쪽으로 위치된 벨트(8)도 간격D로 구동풀리(6)에서 떨어진 상태를 가지며, 상기 간격 C와 D는 동일한 간격이다.Due to the spacing C formed between the driven pulley 7 and the ball nut 9, the belt 8 positioned toward the drive pulley 6 also has a state away from the drive pulley 6 at an interval D, D is the same interval.

이는 구동풀리(6)와 종동풀리(7)간 축간거리A를 형성함을 나타내고, 상기 축간거리A는 축간거리B에 비해 간격C(또는 D)만큼 짧게 형성된다.This indicates that the interaxial distance A between the drive pulley 6 and the driven pulley 7 is formed, and the interaxial distance A is shorter by the interval C (or D) than the interaxial distance B.

상기와 같이 가조립된 상태에서 도 2(나)에 도시된 바와 같이, 종동풀리(7)를 볼너트(9)쪽으로 강하게 밀어 넣으면, 상기 볼너트(9)에 종동풀리(7)가 압입되면서 간격C와 D가 제거되면서 축간거리A와 축간거리B를 같게 만드는 동일한 축간거리E로 전환된다.As shown in FIG. 2 (b) in the assembled state as described above, when the driven pulley 7 is strongly pushed toward the ball nut 9, the driven pulley 7 is press-fitted into the ball nut 9 and spaced apart. The elimination of C and D converts to the same interaxial distance E, which makes the interaxial distance A and the interaxial distance B the same.

이는, 상기 볼너트(9)의 위치플랜지(9a)가 종동풀리(7)의 외측내경단(7a)을 지나 내측내경단(7b)에 끼워져 종동풀리(7)와 볼너트(9)의 축중심이 서로 일치된 조립 상태를 이루고, 이와 같이 상기 종동풀리(7)와 볼너트(9)간 조립 완료로서 상기 구동풀리(6)와 종동풀리(7)를 감싼 벨트(8)의 장력이 자동적으로 만들어진다. This means that the position flange 9a of the ball nut 9 passes through the outer inner diameter end 7a of the driven pulley 7 and into the inner inner diameter end 7b so that the shaft of the driven pulley 7 and the ball nut 9 is fixed. The center of the assembly is in a state of mutual agreement, and thus the tension of the belt 8 surrounding the driving pulley 6 and the driven pulley 7 is automatically obtained as the assembly between the driven pulley 7 and the ball nut 9 is completed. Is made.

이어 벨트(8)의 장력형성을 위한 조립이 완료되면, 상기 종동풀리(7)의 볼트홀(7d)을 통해 볼트(10)를 체결해 볼너트(9)를 고정한다.Subsequently, when the assembly for forming the tension of the belt 8 is completed, the bolt 10 is fastened through the bolt hole 7d of the driven pulley 7 to fix the ball nut 9.

이와 같이 본 실시예는 모터(4)의 회전력을 랙바(2a)의 축방향 이동으로 전환하는 볼너트(9)를 회전시키는 종동풀리(7)가 모터(4)와 랙바(2a)의 축간거리를 조립전후로 변화시킴으로써, 공정상 번거러움없이 상기 종동풀리(7)를 볼너트(9)에 조립하는 작업만으로 자동으로 벨트(8)의 장력을 확보하는 편리함과 조립시간 단축은 물론, 조립공정 자동화적용을 용이하게 구현할 수 있다.Thus, in this embodiment, the driven pulley 7 which rotates the ball nut 9 which converts the rotational force of the motor 4 into the axial movement of the rack bar 2a is the interaxial distance of the motor 4 and the rack bar 2a. By changing the before and after assembly, the assembly and assembly of the driven pulley (7) to the ball nut (9) without the hassle in the process of automatically securing the tension of the belt (8) and shortening the assembly time, as well as automated assembly process Can be easily implemented.

도 1은 본 발명에 따른 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치의 구성도1 is a configuration of the automatic belt tension adjustment type rack assist type electric steering apparatus according to the present invention

도 2(가),(나)는 본 발명에 따른 자동 벨트 장력 조절타입 조타력 발생기 부분의 조립도Figure 2 (a), (b) is an assembly view of the automatic belt tension adjustment type steering force generator portion according to the present invention

<도면의 주요부분에 대한 부호의 설명>    <Description of the symbols for the main parts of the drawings>

1 : 조향기어 2 : 랙하우징 1: Steering Gear 2: Rack Housing

2a : 랙바 3 : 조타력부여기2a: rack bar 3: steering force

4 : 모터 4a : 모터축4 motor 4a motor shaft

5 : 풀리하우징 6 : 구동풀리5: Pulley Housing 6: Drive Pulley

7 : 종동풀리 7a : 외측내경단7: driven pulley 7a: outer inner diameter end

7b : 내측내경단 7c : 축홀7b: inner diameter end 7c: shaft hole

8 : 벨트 9 : 볼너트8: belt 9: ball nut

9a : 위치플랜지 10 : 볼트9a: Position flange 10: Bolt

Claims (3)

조향기어를 장착한 랙하우징의 랙바의 축방향 이동을 위한 동력을 모터로 제공하는 랙 어시스트식 전동 조향장치에 있어서, In the rack assist type electric steering apparatus for providing power to the motor for the axial movement of the rack bar of the rack housing equipped with a steering gear, 상기 모터에 고정된 구동풀리와 벨트로 연결되어, 상기 랙바에 결합된 볼너트로 회전력을 전달하는 종동풀리를 갖추되, 상기 랙바의 축중심에 대해 상하로 움직이는 여유간격을 갖고, 상기 볼너트와 조립완료상태에서 상기 랙바의 축중심에 일치되는 상기 종동풀리를 포함한 것을 특징으로 하는 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치.It is connected to the drive pulley and the belt fixed to the motor, and has a driven pulley for transmitting the rotational force to the ball nut coupled to the rack bar, and has a clearance to move up and down with respect to the axial center of the rack bar, and the ball nut Automatic assisted belt tension control type rack assist type electric steering device, characterized in that it comprises the driven pulley corresponding to the center of the rack bar in the assembled state. 청구항 1에 있어서, 상기 종동풀리는 안쪽 공간으로 외측내경단에 이어진 내측내경단의 직경을 줄여 2단 직경으로 단차시키며, 상기 내측내경단은 상기 볼너트의 최대 직경인 위치플랜지가 삽입될 수 있는 직경을 갖는 것을 특징으로 하는 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치. The method according to claim 1, wherein the driven pulley reduces the diameter of the inner inner diameter leading to the outer inner end of the inner space step to the second stage diameter, the inner inner diameter is the diameter of the position flange which is the maximum diameter of the ball nut can be inserted Automatic belt tension adjustment type rack assist type electric steering apparatus having a. 청구항 2에 있어서, 상기 종동풀리에는 상기 랙바의 직경보다 큰직경으로 축중심에 축홀을 뚫고, 상기 축홀의 주위로 다수의 볼트홀을 뚫은 것을 특징으로 하는 자동 벨트 장력 조절타입 랙 어시스트식 전동 조향장치. The automatic belt tension adjustment type rack assist type electric steering apparatus according to claim 2, wherein the driven pulley has a shaft hole drilled in the shaft center with a diameter larger than the diameter of the rack bar, and a plurality of bolt holes are drilled around the shaft hole. .
KR1020090082350A 2009-09-02 2009-09-02 Belt tension automatic adjusted type rack assist motor driven power steering KR20110024372A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103085857A (en) * 2011-11-03 2013-05-08 万都株式会社 Rack assist type steering apparatus and rack assist type electric power steering apparatus having the same
KR101297649B1 (en) * 2011-09-26 2013-08-20 현대자동차주식회사 Combined operation structure of MDPS and compressor
WO2014159031A1 (en) * 2013-03-14 2014-10-02 Trw Automotive U.S. Llc Electric power steering assembly
KR20160094015A (en) * 2015-01-30 2016-08-09 주식회사 만도 Electric Power Steering Apparatus
CN111615482A (en) * 2018-01-18 2020-09-01 Zf主动安全和电子美国有限责任公司 Device for steering steerable vehicle wheels

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101297649B1 (en) * 2011-09-26 2013-08-20 현대자동차주식회사 Combined operation structure of MDPS and compressor
CN103085857A (en) * 2011-11-03 2013-05-08 万都株式会社 Rack assist type steering apparatus and rack assist type electric power steering apparatus having the same
WO2014159031A1 (en) * 2013-03-14 2014-10-02 Trw Automotive U.S. Llc Electric power steering assembly
CN105339236A (en) * 2013-03-14 2016-02-17 Trw汽车美国有限责任公司 Electric power steering assembly
US9440672B2 (en) 2013-03-14 2016-09-13 Trw Automotive U.S. Llc Electric power steering assembly
KR20160094015A (en) * 2015-01-30 2016-08-09 주식회사 만도 Electric Power Steering Apparatus
CN111615482A (en) * 2018-01-18 2020-09-01 Zf主动安全和电子美国有限责任公司 Device for steering steerable vehicle wheels
CN111615482B (en) * 2018-01-18 2022-10-25 Zf主动安全和电子美国有限责任公司 Device for steering steerable vehicle wheels

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